[单选题]
An ideal gas in a con9.doruyldm et,:3o. e8 hk,vo t bqx2cx6uw8 *b7q vyw:ainer of volume $100 cm^{3}$ at $20 \; ^{\circ}C$ has a pressure of $100 \; N/m^2$. Determine the number of gas molecules in the container.
A. $4.2 \times 10^{6}$
B. $6.0 \times 10^{23}$
C. $2.5 \times 10^{18}$
D. $5.2 \times 10^{18}$
